Flamenco in Sevilla

I don't know about the two locations you mentioned. I went to Pura Esencia (https://puraesenciaflamenco.com/en/). It's a very small venue, no one sitting in front of anyone else. It was brilliant. It's in Triana, right on the street that runs along the river, so maybe not as central a location, but that's an advantage, because it wasn't packed with tourists when I was there. Maybe ten or fifteen people in the audience.

CWSocial had a great trip to Southern Spain and saw quite a bit of flamenco. https://community.ricksteves.com/travel-forum/trip-reports/november-getaway-in-andalusia

I've been to shows at both places and they are very similar. Both small, intimate venues offering good performances. Of the two, I probably prefer Casa de la Memoria, but you really can't go wrong with either one.

I do not remember the name of the flamenco show that we saw, but it was performed on a raised platform that I was able to see very well at my 5'1" height. The seats were only about 4-5 deep and we were in the 3rd row. It was a real treat and I'm glad we went. The facial expressions on the woman, especially, communicated much.

I don't know how common impromptu flamenco performances are, but we were treated to one a few years later in the Plaza de Espana in Seville. It was free and a wonderful experience.

We did a show at the Museo del Baile Flamenco ( https://museodelbaileflamenco.com ) which was quite good. We also did a non-professional bar+flamenco down the street at La Carboneria. Definitely fun - both of them - in different ways.

And for the flamenco museum show, there were exhibits as well (included), and we also got there early enough we could pick our seats near the front center - but just a few seats to the side of the "sweat" splatter zone (eww?). Performers do build up quite a sweat, so the truly front and center seats (say the middle six) are likely to have a bit of that.